Bobbin-holder.



PATENTED AUG. 18, 1903.

T. J. MURDOGK.

BOBBIN HOLDER.

APPLICATION FILED DEO. 12. 1901. v

N0 MODEL.

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NTTn STATES Patented August 18, 1903.

`ATENT 'T11 FFICE.

THOMAS J. MURDOCK, OF FRANKLIN, MASSACHUSETTS, ASSIGNOR TO MURDOCK AND GEB COMPANY, OF FRANKLIN, MASSACHUSETTS.

Bonnin-Homes.

SPECIFICATION forming part of Letters Patent No. 736,617, dated August 18, 1903.

Application filed December 12, 1901. Serial No. 85,623. (No model.)

To @ZZ whom, it may concern.-

Be it known that I, THOMAS J. MURDooK, a citizen of the United States, residing at Franklin, in the county of Norfolk and State of Massachusetts, have invented a new and useful Improvement in Bobbin-Holders, of which the following is a specication.

This invention has reference to an improvement in the construction of bobbin-holders having holding-jaws and an annular coiled spring encircling the said jaws. As heretofore constructed the jaws were usually connected pivotally with the base of the holder and the jaws were swung on this pivotal connection to grasp or release the bobbin. Practice has demonstrated that the pivotal connection of the jaws with the holder soon wears and destroys the holder.

The object of this invention is to produce a more durable bobbin-holder which retains the advantages of the holding-jaws and the inclosing annular spring.

Another object is to simplfy the construction of the holder; and to this end the invention consists in providing the base' of the holder with radially-disposed ways and the jaws with bases sliding in the radial ways and in the combination of parts more fully set forth hereinafter and more particularl pointed out in the claims.

Figure lis a side view of a spindle provided with my improved holder, showing a bobbin secured in the holder. Fig. 2 is a top view of the holder, showing the bobbin in section and parts of the holder cut away to illustrate the construction.` Fig. 3 is a vertical sectional view of the bobbin-holder and bobbinhead, showing part of the spindle. Fig. 4L is a plan View of the annular plate forming the vertical support of the bobbin-head. Fig. 5 is plan view of the clamping-jaws, showing the sliding bases on the jaws. Fig. 6 is a plan view of the way-plate. Fig. 7 is a plan view of the base-plate of the holder. Fig. 8 is a vertical section View of a modified form of the holder in which the way-plate shown in Fig. 6 is omitted and the Ways are formed in the base-plate.

Similar marks of reference indicate corresponding parts in all the ligures.

In the drawings, ct indicates the spindle; d', the bobbin; 0.2, the head of the bobbin, and as a groove in the peripheral surface of the head of the bobbin. The ring b, formed like an eyelet, is a short tube having an enlargement on one end to form a shoulder. Perforated plates may be placed o n the tube resting on the shoulder and then the other end of the tube upset to firmly secure the plates, when the ring may be driven on the spindle.

In the preferred form the base-plate c, having the central perforation c', is first placed on the tubular part of the ring b. The baseplate c is formed in a die into a cup having the rim c2 and has the perforations c3 c8 cut out of the plate around the peripheral edge of the base-plate, as is shown in Fig. 3, to form a series of thread-catchers by which the Winding of the thread on the spindle before removing the completed bobbin is facilitated. On the base-plate c is placed the plate d, also perforated through the center and provided with the ways d' d', in which the bases c' e of the clamping-jaws may slide radially from and toward the spindle. To facilitate the `free sliding of the bases e e in the ways cl CZ',

the plated is of greater thickness than are the bases e c' of the clamping-jaws. The washer f, also centrally perforated, is placed on top of the plate d and, like the plates c and d, on the tubular portion of the ring b. The tubular portion of the ring is now riveted over the washer or upset in a die to secure all the parts together. The annular spiral spring g isplaced around the clamping-jaws e e and the ring b forcedon the spindle. The annular spiral spring g draws the clampingjaws toward the spindle and firmly against the bobbin head d2, partly entering the groove d3. The clamping-jaws slide freely in the ways d' d of the plate d. With the bases e/ e/ of the clamping-jawsof less thickness than the plate ol a slight rocking motion of the clamping-jaws is secured,which facilitates the insertion of the bobbin-head.

In the modified form shown in Fig. 8 the plate d is omitted and the ways d d are formed in the base-plate c by suitable dies.

The bobbin-holder is very compact and, with the exception of the annular spring, is

IOO

formed by dies. The wearing-surfaces are large, and the bases of the clamping-jaws slide easily in their Ways, causing practically washer, and an annular spring encircling the clamping-jaws, as described.

3. The combination in a bobbin-holder with a base-plate c having the perforations c3, the plate d having ways d', the washer f, and a ring or ferrule b for securing the base-plate, the plate having the ways and the washer together,of clamping-jaws e e provided with bases e' e and an annular spring g encircling the clamping-jaws, as described.

In testimony whereof I have signed my name to this specification in the presence of 3o two subscribing witnesses. n l THOMAS J. MURDOCK.

Witnesses:

ADA E. HAGERTY, J. A. MILLER, Jr. 

